Overedge sewing-machine.



No. 641,780. Patented 1an. 23, |900. H. A. KLEMM.

UVEBEDGE SEWING MACHINE.

(Application led Sept. 3, 189B.) (No Model.) 2 Sheets-Sheet I.

WITNESSES: INVENTUR rmt mams PETERS co.. Pnofou'mo.. wAsHmaToN. n.1;

. Patented lan. 23, |900. H. A. KLEMM.

^ OVEREDGE SEWING MACHINE.

(Application filed Sept. 3, 189B.)

2 Sheets-Sheet 2l (No Model.)

3&0.. 5.

EQ AMM/v. gaga/p@ ATTORNEY HERMANN A. 'KLEMM,

OF NEW YORK, N. Y.

OVEREDGE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 641,780, dated January 23, 1900.

Application tiled September 3. 1898. beral No. 690,161.v (No model.)

To all, whom t may concernf Be it known that I, HERMANN A. -KIEMM, a citizen of the United States of America, and a residentof New York, borough of Brooklyn, county of Kings, and State of NewYork, have invented certain new and useful Improvements in Overedge SeWing-Machines,of which the following is a specification.

My invention consists of improvements in apparatus for actuating thelooper whereby means of positive action without the use of springs may be provided in a simple and comparatively inexpensive construction, also irnprovements in the feed mechanism, as hereinafter described, reference being made to the accompanying drawings, in which- Figure l is a sectional elevation of themachine, the section being taken on line 2 2 of Fig. 2. Fig. 2 is a plan View. Fig. 3 is a sectional elevation on line 3 3 of Fig. 2 with parts broken out. Fig. 4 is a sectional elevation on line 4 4 of Fig. 2. Fig..5 is a sectional view of the pivot mechanism of the feed-lever; and Fig. 6 is a side elevation of the feed-lever and the eccentric on the main shaft for operating said lever, the shaft being represented in cross-section.

A represents the main shaft, to which the power is applied by a belt on the pulley a.

b represents the needle-bar. It is mounted in the bearings c to be reciprocated in the usual manner by an eccentric d on shaft a working between the horns of the yoke e, attached to said bar by the hub f.'

The needle g is carried in the lower end of the arm h, pendent from the forward end of the needle-bar b, so as to work across the feed-line of the goods between the feed-disks 7l and j and directly over the upper faces of said disks.

The looper lc is carried'by the arm Z, pendent from the forward end of the looper-bar m, In my approved contrivance of apparatus for working the looper this looper-bar is pivoted at n on the upper end of a supporting-arm o, so as to vibrate in a vertical plane, and the supporting-arm is mounted on a rocking and reciprocating shaft p, having bearings q in opposite sides of the frame and being coupled by connecting-rod s with an eccentric t on the main shaft A for rocking the arm o to impart the lengthwise movements of the looper-bar.

For effecting the lateral movements of the looper-bar the shaft 19 has a rigid arm u engaging the cam-groove@ in the face of a disk w on shaft A, and the connecting-rod s is coupled with supporting-arm 0 by a ball-andsocket joint ai, and the eccentric and yoke y are similarly fitted to permit such lateral movement.

For causing the vibrations of the looperbar in the vertical plane the rear end of the said bar has a lateral stud z engaging the cam-groove a/in one side of the cam-disk b', mounted on shaft A. (See Fig. 3 This cam-groove a' is cut entirely through the thickness of the disk in that'part of its course where the groove if 'not cut through would be too shallow forthe lateral traverse of the stud z unless the disk b were made thicker than is desirable. It will be seen that this contrivance is a very simple construction for effecting the complicated seXtuple movements of the looper in the required times and accelerated and retarded motions relatively to the needle and its movements, and, the arrangement of the sliding support of the looper- :supporting arm affords easy, accurate and lasting bearings.

By usingv the cam-groove a' in the side of the'disk Vb for imparting the vertical vibrations of .the looper-bar such operation is obtained without any interference whatever with the lateral and lengthwise movements of said bar and without the provision of any special devices therefor, and by using the reciprocating and rocking shaft p for carrying the looper-bar-supporting arm with the universally-jointed connecting-rod positive lateral and lengthwise movements of the looperbar are obtained by very simple means.

The feeding-disks t' andfj' and the pawl mechanism for operating the driving-disk 'L are practically the same as represented in my Patent No. 571,322 and are not therefore illustrated nor described in detail herein, except that in the present case I have mounted fthe disk j by a sleeve c', revoluble on the fixed supporting-stud d and geared by the spurwheels e' with the shaft of disk i for positive motion of disk j also.

IOO

The standard d is mounted on the short arm f of lever g', pivoted at h', to be employed for opening and closing the feed-disks on the work, as usual.

The pawl-lever t" and the connecting-rod j for actuating the disk through the beforementioned ratchet mechanism, (not shown, but understood to be organized within the disk 7e on the shaft of disk i, same as in the before-mentioned patent,) are also same as in said patent; but the arrangement of the feedlever Z for Working said pawl-lever to vary the length of the stitches is the subject of claims in this case. The said feed-lever is arranged in an upright position on a pivotsleeve m and coupled in a slot 0/ of said lever, with aneccentric p' of the shaft A to impart vibration to the lever, which is at its lcwerend jointed to the connecting-rodi at s'.

The pivot-sleeve on is carried in a supporting-sleeve that is adjustable up and down in a slot u' of the supporting-frame and is adapted to be secured in diereut positions by the clam ping-nut yv to vary the throw of the lever. The said pivot-sleeve m has a head w' and is bored centrally for reception of a clamping-bolt having a head y', be-

tween which and head w' the lever Z' is clamped to hold it in position-` said lever being slotted at Z' to allowthe pivot to be shifted along the lever to vary the feed. 'Io shift the pivot, the sleeve t is slackened to free it for shifting, the nut on the clamping-bolt is also slackened to release the grip of the lever by the heads w and y', the le'ver is temporarily locked against shifting with the pivot by the push-pin a2, located in the frame in suitable relation to the upper end of the lever to be thrust into a socket b2 thereon, and while thus held the pivot is shifted up or down both in the slot u' of the frame and in the slot of the lever, and then both the sleeve and the lever-holding clamp are tightened up.

A spring c2 withdraws the push-pin a2 from the socket of the lever when the push-pin is relieved of pressure after the adjustment of the lever.

What I claim as my in vent-ion is- 1. In an overedge sewingmachine, the combination with the horizontally-reciprocating needle-bal', and the horizontal feeddisks, of the vertically-oscillating and forwardly and backwardly swinging looper-bar, the forwardly and backwardly rocking and laterally-sliding supporting-bar whereon the looper-bar is pivoted, rocking and reciprocating shaft carrying said supporting-bar, cam on the main shaft for reciprocating the needle-bar, and the eccentric and cam on said ,inain shaft for respectively rocking and sliding said supporting-bar.

2. The combination with the feedlever havingthe slotted aperture for its supportingpivot, said supporting-pivot, the supportingsleeve t' forsaid pivot, adapted to be adjusted along its support and relatively to the lever, the pivot-sleeve m carried in the supportingsleeve and having a clamping-head for the lever, and the clamping-bolt w' also having a clamping-head for positively securing the lever between its head and the head of the pivot-sleeve and beinginserted in the pivotsleeve substantially as described.

3. The combination of the feed-lever, its supporting-pivot, said pivot being adjustable along said feed-lever; the push-pin, said pushpin located in the case and adapt-ed to engage and temporarily hold the lever While adjusting the pivot, and the eccentric for operating` the lever.

Signed by me at New York, N. Y., this 27th day of August, 1898.

HERMANN A. KLEMDI.

Vtitnesses:

A. P. THAYER, C. SEDGWICK. 

